Bill has some counter in a bag.
3 of the counters are red
7 of the counters are blue
t...
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Mathematics, 09.09.2021 20:30 elie84
Bill has some counter in a bag.
3 of the counters are red
7 of the counters are blue
the rest of the countes are yellow
Bill takes at random a counter from the bag
The probability that he takes a yellow counter is 2/7
(b) How many yellow counters are in the bag before Bill takes a counter
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